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clang-p2996/llvm/test/Transforms/CallSiteSplitting/callsite-split-or-phi.ll
Florian Hahn b4e3bad89b Recommit r325001: [CallSiteSplitting] Support splitting of blocks with instrs before call. 
For basic blocks with instructions between the beginning of the block
and a call we have to duplicate the instructions before the call in all
split blocks and add PHI nodes for uses of the duplicated instructions
after the call.

Currently, the threshold for the number of instructions before a call
is quite low, to keep the impact on binary size low.

Reviewers: junbuml, mcrosier, davidxl, davide

Reviewed By: junbuml

Differential Revision: https://reviews.llvm.org/D41860

llvm-svn: 325126
2018-02-14 13:59:12 +00:00

535 lines
14 KiB
LLVM
Raw Blame History

; RUN: opt < %s -callsite-splitting -S | FileCheck %s
; RUN: opt < %s -passes='function(callsite-splitting)' -S | FileCheck %s
target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
target triple = "aarch64-linaro-linux-gnueabi"
;CHECK-LABEL: @test_eq_eq
;CHECK-LABEL: Header:
;CHECK: br i1 %tobool1, label %Header.split, label %TBB
;CHECK-LABEL: Header.split:
;CHECK: %[[CALL1:.*]] = call i32 @callee(i32* null, i32 %v, i32 1)
;CHECK-LABEL: TBB:
;CHECK: br i1 %cmp, label %TBB.split, label %End
;CHECK-LABEL: TBB.split:
;CHECK: %[[CALL2:.*]] = call i32 @callee(i32* nonnull %a, i32 1, i32 2)
;CHECK-LABEL: Tail
;CHECK: %[[MERGED:.*]] = phi i32 [ %[[CALL1]], %Header.split ], [ %[[CALL2]], %TBB.split ]
;CHECK: ret i32 %[[MERGED]]
define i32 @test_eq_eq(i32* %a, i32 %v) {
Header:
%tobool1 = icmp eq i32* %a, null
br i1 %tobool1, label %Tail, label %TBB
TBB:
%cmp = icmp eq i32 %v, 1
br i1 %cmp, label %Tail, label %End
Tail:
%p = phi i32[1,%Header], [2, %TBB]
%r = call i32 @callee(i32* %a, i32 %v, i32 %p)
ret i32 %r
End:
ret i32 %v
}
;CHECK-LABEL: @test_eq_eq_eq
;CHECK-LABEL: Header2.split:
;CHECK: %[[CALL1:.*]] = call i32 @callee(i32* null, i32 %v, i32 10)
;CHECK-LABEL: TBB.split:
;CHECK: %[[CALL2:.*]] = call i32 @callee(i32* null, i32 1, i32 %p)
;CHECK-LABEL: Tail
;CHECK: %[[MERGED:.*]] = phi i32 [ %[[CALL1]], %Header2.split ], [ %[[CALL2]], %TBB.split ]
;CHECK: ret i32 %[[MERGED]]
define i32 @test_eq_eq_eq(i32* %a, i32 %v, i32 %p) {
Header:
%tobool1 = icmp eq i32* %a, null
br i1 %tobool1, label %Header2, label %End
Header2:
%tobool2 = icmp eq i32 %p, 10
br i1 %tobool2, label %Tail, label %TBB
TBB:
%cmp = icmp eq i32 %v, 1
br i1 %cmp, label %Tail, label %End
Tail:
%r = call i32 @callee(i32* %a, i32 %v, i32 %p)
ret i32 %r
End:
ret i32 %v
}
;CHECK-LABEL: @test_eq_eq_eq_constrain_same_i32_arg
;CHECK-LABEL: Header2.split:
;CHECK: %[[CALL1:.*]] = call i32 @callee(i32* %a, i32 222, i32 %p)
;CHECK-LABEL: TBB.split:
;CHECK: %[[CALL2:.*]] = call i32 @callee(i32* %a, i32 333, i32 %p)
;CHECK-LABEL: Tail
;CHECK: %[[MERGED:.*]] = phi i32 [ %[[CALL1]], %Header2.split ], [ %[[CALL2]], %TBB.split ]
;CHECK: ret i32 %[[MERGED]]
define i32 @test_eq_eq_eq_constrain_same_i32_arg(i32* %a, i32 %v, i32 %p) {
Header:
%tobool1 = icmp eq i32 %v, 111
br i1 %tobool1, label %Header2, label %End
Header2:
%tobool2 = icmp eq i32 %v, 222
br i1 %tobool2, label %Tail, label %TBB
TBB:
%cmp = icmp eq i32 %v, 333
br i1 %cmp, label %Tail, label %End
Tail:
%r = call i32 @callee(i32* %a, i32 %v, i32 %p)
ret i32 %r
End:
ret i32 %v
}
;CHECK-LABEL: @test_ne_eq
;CHECK-LABEL: Header.split:
;CHECK: %[[CALL1:.*]] = call i32 @callee(i32* nonnull %a, i32 %v, i32 1)
;CHECK-LABEL: TBB.split:
;CHECK: %[[CALL2:.*]] = call i32 @callee(i32* null, i32 1, i32 2)
;CHECK-LABEL: Tail
;CHECK: %[[MERGED:.*]] = phi i32 [ %[[CALL1]], %Header.split ], [ %[[CALL2]], %TBB.split ]
;CHECK: ret i32 %[[MERGED]]
define i32 @test_ne_eq(i32* %a, i32 %v) {
Header:
%tobool1 = icmp ne i32* %a, null
br i1 %tobool1, label %Tail, label %TBB
TBB:
%cmp = icmp eq i32 %v, 1
br i1 %cmp, label %Tail, label %End
Tail:
%p = phi i32[1,%Header], [2, %TBB]
%r = call i32 @callee(i32* %a, i32 %v, i32 %p)
ret i32 %r
End:
ret i32 %v
}
;CHECK-LABEL: @test_ne_eq_ne
;CHECK-LABEL: Header2.split:
;CHECK: %[[CALL1:.*]] = call i32 @callee(i32* nonnull %a, i32 %v, i32 10)
;CHECK-LABEL: TBB.split:
;CHECK: %[[CALL2:.*]] = call i32 @callee(i32* nonnull %a, i32 %v, i32 %p)
;CHECK-LABEL: Tail
;CHECK: %[[MERGED:.*]] = phi i32 [ %[[CALL1]], %Header2.split ], [ %[[CALL2]], %TBB.split ]
;CHECK: ret i32 %[[MERGED]]
define i32 @test_ne_eq_ne(i32* %a, i32 %v, i32 %p) {
Header:
%tobool1 = icmp ne i32* %a, null
br i1 %tobool1, label %Header2, label %End
Header2:
%tobool2 = icmp eq i32 %p, 10
br i1 %tobool2, label %Tail, label %TBB
TBB:
%cmp = icmp ne i32 %v, 1
br i1 %cmp, label %Tail, label %End
Tail:
%r = call i32 @callee(i32* %a, i32 %v, i32 %p)
ret i32 %r
End:
ret i32 %v
}
;CHECK-LABEL: @test_ne_ne
;CHECK-LABEL: Header.split:
;CHECK: %[[CALL1:.*]] = call i32 @callee(i32* nonnull %a, i32 %v, i32 1)
;CHECK-LABEL: TBB.split:
;CHECK: %[[CALL2:.*]] = call i32 @callee(i32* null, i32 %v, i32 2)
;CHECK-LABEL: Tail
;CHECK: %[[MERGED:.*]] = phi i32 [ %[[CALL1]], %Header.split ], [ %[[CALL2]], %TBB.split ]
;CHECK: ret i32 %[[MERGED]]
define i32 @test_ne_ne(i32* %a, i32 %v) {
Header:
%tobool1 = icmp ne i32* %a, null
br i1 %tobool1, label %Tail, label %TBB
TBB:
%cmp = icmp ne i32 %v, 1
br i1 %cmp, label %Tail, label %End
Tail:
%p = phi i32[1,%Header], [2, %TBB]
%r = call i32 @callee(i32* %a, i32 %v, i32 %p)
ret i32 %r
End:
ret i32 %v
}
;CHECK-LABEL: @test_ne_ne_ne_constrain_same_pointer_arg
;CHECK-LABEL: Header2.split:
;CHECK: %[[CALL1:.*]] = call i32 @callee(i32* nonnull %a, i32 %v, i32 %p)
;CHECK-LABEL: TBB.split:
;CHECK: %[[CALL2:.*]] = call i32 @callee(i32* nonnull %a, i32 %v, i32 %p)
;CHECK-LABEL: Tail
;CHECK: %[[MERGED:.*]] = phi i32 [ %[[CALL1]], %Header2.split ], [ %[[CALL2]], %TBB.split ]
;CHECK: ret i32 %[[MERGED]]
define i32 @test_ne_ne_ne_constrain_same_pointer_arg(i32* %a, i32 %v, i32 %p, i32* %a2, i32* %a3) {
Header:
%tobool1 = icmp ne i32* %a, null
br i1 %tobool1, label %Header2, label %End
Header2:
%tobool2 = icmp ne i32* %a, %a2
br i1 %tobool2, label %Tail, label %TBB
TBB:
%cmp = icmp ne i32* %a, %a3
br i1 %cmp, label %Tail, label %End
Tail:
%r = call i32 @callee(i32* %a, i32 %v, i32 %p)
ret i32 %r
End:
ret i32 %v
}
;CHECK-LABEL: @test_eq_eq_untaken
;CHECK-LABEL: Header.split:
;CHECK: %[[CALL1:.*]] = call i32 @callee(i32* nonnull %a, i32 %v, i32 1)
;CHECK-LABEL: TBB.split:
;CHECK: %[[CALL2:.*]] = call i32 @callee(i32* null, i32 1, i32 2)
;CHECK-LABEL: Tail
;CHECK: %[[MERGED:.*]] = phi i32 [ %[[CALL1]], %Header.split ], [ %[[CALL2]], %TBB.split ]
;CHECK: ret i32 %[[MERGED]]
define i32 @test_eq_eq_untaken(i32* %a, i32 %v) {
Header:
%tobool1 = icmp eq i32* %a, null
br i1 %tobool1, label %TBB, label %Tail
TBB:
%cmp = icmp eq i32 %v, 1
br i1 %cmp, label %Tail, label %End
Tail:
%p = phi i32[1,%Header], [2, %TBB]
%r = call i32 @callee(i32* %a, i32 %v, i32 %p)
ret i32 %r
End:
ret i32 %v
}
;CHECK-LABEL: @test_eq_eq_eq_untaken
;CHECK-LABEL: Header2.split:
;CHECK: %[[CALL1:.*]] = call i32 @callee(i32* nonnull %a, i32 %v, i32 10)
;CHECK-LABEL: TBB.split:
;CHECK: %[[CALL2:.*]] = call i32 @callee(i32* nonnull %a, i32 1, i32 %p)
;CHECK-LABEL: Tail
;CHECK: %[[MERGED:.*]] = phi i32 [ %[[CALL1]], %Header2.split ], [ %[[CALL2]], %TBB.split ]
;CHECK: ret i32 %[[MERGED]]
define i32 @test_eq_eq_eq_untaken(i32* %a, i32 %v, i32 %p) {
Header:
%tobool1 = icmp eq i32* %a, null
br i1 %tobool1, label %End, label %Header2
Header2:
%tobool2 = icmp eq i32 %p, 10
br i1 %tobool2, label %Tail, label %TBB
TBB:
%cmp = icmp eq i32 %v, 1
br i1 %cmp, label %Tail, label %End
Tail:
%r = call i32 @callee(i32* %a, i32 %v, i32 %p)
ret i32 %r
End:
ret i32 %v
}
;CHECK-LABEL: @test_ne_eq_untaken
;CHECK-LABEL: Header.split:
;CHECK: %[[CALL1:.*]] = call i32 @callee(i32* null, i32 %v, i32 1)
;CHECK-LABEL: TBB.split:
;CHECK: %[[CALL2:.*]] = call i32 @callee(i32* nonnull %a, i32 1, i32 2)
;CHECK-LABEL: Tail
;CHECK: %[[MERGED:.*]] = phi i32 [ %[[CALL1]], %Header.split ], [ %[[CALL2]], %TBB.split ]
;CHECK: ret i32 %[[MERGED]]
define i32 @test_ne_eq_untaken(i32* %a, i32 %v) {
Header:
%tobool1 = icmp ne i32* %a, null
br i1 %tobool1, label %TBB, label %Tail
TBB:
%cmp = icmp eq i32 %v, 1
br i1 %cmp, label %Tail, label %End
Tail:
%p = phi i32[1,%Header], [2, %TBB]
%r = call i32 @callee(i32* %a, i32 %v, i32 %p)
ret i32 %r
End:
ret i32 %v
}
;CHECK-LABEL: @test_ne_eq_ne_untaken
;CHECK-LABEL: Header2.split:
;CHECK: %[[CALL1:.*]] = call i32 @callee(i32* null, i32 %v, i32 10)
;CHECK-LABEL: TBB.split:
;CHECK: %[[CALL2:.*]] = call i32 @callee(i32* null, i32 %v, i32 %p)
;CHECK-LABEL: Tail
;CHECK: %[[MERGED:.*]] = phi i32 [ %[[CALL1]], %Header2.split ], [ %[[CALL2]], %TBB.split ]
;CHECK: ret i32 %[[MERGED]]
define i32 @test_ne_eq_ne_untaken(i32* %a, i32 %v, i32 %p) {
Header:
%tobool1 = icmp ne i32* %a, null
br i1 %tobool1, label %End, label %Header2
Header2:
%tobool2 = icmp eq i32 %p, 10
br i1 %tobool2, label %Tail, label %TBB
TBB:
%cmp = icmp ne i32 %v, 1
br i1 %cmp, label %Tail, label %End
Tail:
%r = call i32 @callee(i32* %a, i32 %v, i32 %p)
ret i32 %r
End:
ret i32 %v
}
;CHECK-LABEL: @test_ne_ne_untaken
;CHECK-LABEL: Header.split:
;CHECK: %[[CALL1:.*]] = call i32 @callee(i32* null, i32 %v, i32 1)
;CHECK-LABEL: TBB.split:
;CHECK: %[[CALL2:.*]] = call i32 @callee(i32* nonnull %a, i32 1, i32 2)
;CHECK-LABEL: Tail
;CHECK: %[[MERGED:.*]] = phi i32 [ %[[CALL1]], %Header.split ], [ %[[CALL2]], %TBB.split ]
;CHECK: ret i32 %[[MERGED]]
define i32 @test_ne_ne_untaken(i32* %a, i32 %v) {
Header:
%tobool1 = icmp ne i32* %a, null
br i1 %tobool1, label %TBB, label %Tail
TBB:
%cmp = icmp ne i32 %v, 1
br i1 %cmp, label %End, label %Tail
Tail:
%p = phi i32[1,%Header], [2, %TBB]
%r = call i32 @callee(i32* %a, i32 %v, i32 %p)
ret i32 %r
End:
ret i32 %v
}
;CHECK-LABEL: @test_nonconst_const_phi
;CHECK-LABEL: Header.split:
;CHECK: %[[CALL1:.*]] = call i32 @callee(i32* %a, i32 %v, i32 1)
;CHECK-LABEL: TBB.split:
;CHECK: %[[CALL2:.*]] = call i32 @callee(i32* %a, i32 1, i32 2)
;CHECK-LABEL: Tail
;CHECK: %[[MERGED:.*]] = phi i32 [ %[[CALL1]], %Header.split ], [ %[[CALL2]], %TBB.split ]
;CHECK: ret i32 %[[MERGED]]
define i32 @test_nonconst_const_phi(i32* %a, i32* %b, i32 %v) {
Header:
%tobool1 = icmp eq i32* %a, %b
br i1 %tobool1, label %Tail, label %TBB
TBB:
%cmp = icmp eq i32 %v, 1
br i1 %cmp, label %Tail, label %End
Tail:
%p = phi i32[1,%Header], [2, %TBB]
%r = call i32 @callee(i32* %a, i32 %v, i32 %p)
ret i32 %r
End:
ret i32 %v
}
;CHECK-LABEL: @test_nonconst_nonconst_phi
;CHECK-LABEL: Header.split:
;CHECK: %[[CALL1:.*]] = call i32 @callee(i32* %a, i32 %v, i32 1)
;CHECK-LABEL: TBB.split:
;CHECK: %[[CALL2:.*]] = call i32 @callee(i32* %a, i32 %v, i32 2)
;CHECK-LABEL: Tail
;CHECK: %[[MERGED:.*]] = phi i32 [ %[[CALL2]], %TBB.split ], [ %[[CALL1]], %Header.split ]
;CHECK: ret i32 %[[MERGED]]
define i32 @test_nonconst_nonconst_phi(i32* %a, i32* %b, i32 %v, i32 %v2) {
Header:
%tobool1 = icmp eq i32* %a, %b
br i1 %tobool1, label %Tail, label %TBB
TBB:
%cmp = icmp eq i32 %v, %v2
br i1 %cmp, label %Tail, label %End
Tail:
%p = phi i32[1,%Header], [2, %TBB]
%r = call i32 @callee(i32* %a, i32 %v, i32 %p)
ret i32 %r
End:
ret i32 %v
}
;CHECK-LABEL: @test_cfg_no_or_phi
;CHECK-LABEL: TBB0.split
;CHECK: %[[CALL1:.*]] = call i32 @callee(i32* %a, i32 %v, i32 1)
;CHECK-LABEL: TBB1.split:
;CHECK: %[[CALL2:.*]] = call i32 @callee(i32* %a, i32 %v, i32 2)
;CHECK-LABEL: Tail
;CHECK: %[[MERGED:.*]] = phi i32 [ %[[CALL2]], %TBB1.split ], [ %[[CALL1]], %TBB0.split ]
;CHECK: ret i32 %[[MERGED]]
define i32 @test_cfg_no_or_phi(i32* %a, i32 %v) {
entry:
br i1 undef, label %TBB0, label %TBB1
TBB0:
br i1 undef, label %Tail, label %End
TBB1:
br i1 undef, label %Tail, label %End
Tail:
%p = phi i32[1,%TBB0], [2, %TBB1]
%r = call i32 @callee(i32* %a, i32 %v, i32 %p)
ret i32 %r
End:
ret i32 %v
}
;CHECK-LABEL: @test_nonconst_nonconst_phi_noncost
;CHECK-NOT: Header.split:
;CHECK-NOT: TBB.split:
;CHECK-LABEL: Tail:
;CHECK: %r = call i32 @callee(i32* %a, i32 %v, i32 %p)
;CHECK: ret i32 %r
define i32 @test_nonconst_nonconst_phi_noncost(i32* %a, i32* %b, i32 %v, i32 %v2) {
Header:
%tobool1 = icmp eq i32* %a, %b
br i1 %tobool1, label %Tail, label %TBB
TBB:
%cmp = icmp eq i32 %v, %v2
br i1 %cmp, label %Tail, label %End
Tail:
%p = phi i32[%v,%Header], [%v2, %TBB]
%r = call i32 @callee(i32* %a, i32 %v, i32 %p)
ret i32 %r
End:
ret i32 %v
}
;CHECK-LABEL: @test_3preds_constphi
;CHECK-NOT: Header.split:
;CHECK-NOT: TBB.split:
;CHECK-LABEL: Tail:
;CHECK: %r = call i32 @callee(i32* %a, i32 %v, i32 %p)
;CHECK: ret i32 %r
define i32 @test_3preds_constphi(i32* %a, i32 %v, i1 %c1, i1 %c2, i1 %c3) {
Header:
br i1 %c1, label %Tail, label %TBB1
TBB1:
br i1 %c2, label %Tail, label %TBB2
TBB2:
br i1 %c3, label %Tail, label %End
Tail:
%p = phi i32[1,%Header], [2, %TBB1], [3, %TBB2]
%r = call i32 @callee(i32* %a, i32 %v, i32 %p)
ret i32 %r
End:
ret i32 %v
}
;CHECK-LABEL: @test_indirectbr_phi
;CHECK-NOT: Header.split:
;CHECK-NOT: TBB.split:
;CHECK-LABEL: Tail:
;CHECK: %r = call i32 @callee(i32* %a, i32 %v, i32 %p)
;CHECK: ret i32 %r
define i32 @test_indirectbr_phi(i8* %address, i32* %a, i32* %b, i32 %v) {
Header:
%indirect.goto.dest = select i1 undef, i8* blockaddress(@test_indirectbr_phi, %End), i8* %address
indirectbr i8* %indirect.goto.dest, [label %TBB, label %Tail]
TBB:
%indirect.goto.dest2 = select i1 undef, i8* blockaddress(@test_indirectbr_phi, %End), i8* %address
indirectbr i8* %indirect.goto.dest2, [label %Tail, label %End]
Tail:
%p = phi i32[1,%Header], [2, %TBB]
%r = call i32 @callee(i32* %a, i32 %v, i32 %p)
ret i32 %r
End:
ret i32 %v
}
;CHECK-LABEL: @test_unreachable
;CHECK-LABEL: Header.split:
;CHECK: %[[CALL1:.*]] = call i32 @callee(i32* %a, i32 %v, i32 10)
;CHECK-LABEL: TBB.split:
;CHECK: %[[CALL2:.*]] = call i32 @callee(i32* %a, i32 1, i32 %p)
;CHECK-LABEL: Tail
;CHECK: %[[MERGED:.*]] = phi i32 [ %[[CALL1]], %Header.split ], [ %[[CALL2]], %TBB.split ]
;CHECK: ret i32 %[[MERGED]]
define i32 @test_unreachable(i32* %a, i32 %v, i32 %p) {
Entry:
br label %End
Header:
%tobool2 = icmp eq i32 %p, 10
br i1 %tobool2, label %Tail, label %TBB
TBB:
%cmp = icmp eq i32 %v, 1
br i1 %cmp, label %Tail, label %Header
Tail:
%r = call i32 @callee(i32* %a, i32 %v, i32 %p)
ret i32 %r
End:
ret i32 %v
}
define i32 @callee(i32* %a, i32 %v, i32 %p) {
entry:
%c = icmp ne i32* %a, null
br i1 %c, label %BB1, label %BB2
BB1:
call void @dummy(i32* %a, i32 %p)
br label %End
BB2:
call void @dummy2(i32 %v, i32 %p)
br label %End
End:
ret i32 %p
}
declare void @dummy(i32*, i32)
declare void @dummy2(i32, i32)
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